Sure - there is plenty of attention grabbing AI content - it doesn't have to grab _your_ attention, and it won't work for everyone. I have seen people engaging with apps that redo a selfie to look like a famous character or put the person in a movie scene, for example.

Every piece of content in any feed (good, bad, or otherwise) benefits the aggregator (Meta, YouTube, whatever), because someone will look at it. Not everything will go viral, but it doesn't matter. Scroll whatever on Twitter, YouTube Shorts, Reddit, etc. Meta has a massive presence in social media, so content being generated is shared there.

The more content of any type leads to more engagement on the platforms where it's being shared. Every Meta feed serves the viewer an ad (for which Meta is paid) every 3 or so posts (pieces of content). It doesn't matter if the user doesn't like 1/5 posts or whatever, the number of ads still goes up.